This morning, I received on my cellular the following SMS (translated from French):
Info: This caller tried to call you at 09:47 without leaving a message. Unknown Number in your directory > Call the 0899190721 to identify him
Obviously, this number will be surcharged. How many gullible people will fall in this trap?
It is a nice piece of social engineering. The caller has not left a message. You may want to know who called and why he called. They give a solution to answer these questions… Bingo.
The attack would have been even better if you would have had a failed call just before.
The scammers are really very creative!